Table 1. Reaction conditions and characterizations of HEE-PRXs.
| Sample code a | Feed [HEEA]/[CDI]/[β-CD] molar ratio b | Number of threading β-CDs c | Number of HEE groups on PRX c | Mn,NMR d | Mw/Mn e |
|---|---|---|---|---|---|
| 0.9HEE-PRX | 20/2/1 | 11.1 | 9.6 (0.9) | 22,000 | 1.07 |
| 2.4HEE-PRX | 40/4/1 | 11.1 | 26.7 (2.4) | 24,200 | 1.08 |
| 3.2HEE-PRX | 50/5/1 | 11.1 | 35.1 (3.2) | 25,300 | 1.09 |
| 4.1HEE-PRX | 60/6/1 | 11.1 | 45.8 (4.1) | 26,700 | 1.08 |
| 5.4HEE-PRX | 80/8/1 | 11.1 | 60.3 (5.4) | 28,600 | 1.09 |
| 6.4HEE-PRX | 100/10/1 | 11.1 | 71.5 (6.4) | 30,100 | 1.09 |
| 7.6HEE-PRX | 120/12/1 | 11.1 | 84.2 (7.6) | 31,800 | 1.09 |
| 7.9HEE-PRX | 140/14/1 | 11.1 | 88.0 (7.9) | 32,300 | 1.09 |
a
Abbreviated as XHEE-PRX, where X denotes the average number of HEE groups on a single β-CD threaded in the HEE-PRXs.
b
The feed molar ratio of [HEEA]/[CDI] was kept constant at 10.
c
Determined by 1H NMR in DMSO-d 6. The values in parentheses denote the average number of HEE groups on a single β-CD threaded in the HEE-PRXs.
d
Calculated based on the chemical composition of the HEE-PRXs determined by 1H NMR.
e
Determined by SEC in DMSO containing 10 mM LiBr at 60 °C.